Developer Experience with Java on Kubernetes (JBCNConf 2022)

In the cloud-native world, being a developer might be challenging. The number of technologies and patterns to know can be overwhelming. This session presents an approach based on open-source technologies and focused on improving the inner development loop and continuous delivery on Kubernetes. The end goal is delivering value continuously, quickly, and reliably.

First, I’ll present several techniques for working locally in an effective and productive way. Should you run Kubernetes in your development environment? I’ll cover a few different options. Using Java and Spring Boot, we’ll build a cloud native application following the principles of test-driven development. The inner development loop will be enhanced with Cloud Native Buildpacks, Skaffold, and Telepresence.

Continuous integration is a crucial practice for continuous delivery. We’ll check in code regularly, triggering an automated process to build, test, and package the application. Do you use pull requests? Relying on ArgoCD and Knative, I’ll show you how to work with temporary environments created dynamically when a new pull request is opened. Next, further acceptance tests will be carried on in a production-like environment to ensure the mainline is always in a releasable state. Finally, we’ll deploy and release the new changes to production following the GitOps principles.

Transcript

1. Thomas Vitale JBCNConf Jul 18th, 2022 Developer Experience With Java on Kubernetes @vitalethomas
2. Systematic • Software Architect at Systematic, Denmark. • Author of “Cloud Native Spring in Action” (Manning). • Spring Security and Spring Cloud contributor. Thomas Vitale thomasvitale.com @vitalethomas
3. Developer Experience #jbcn22 @vitalethomas
4. #jbcn22 @vitalethomas Developer Experience “Top of mind for everyone”
5. #jbcn22 @vitalethomas Developer Experience “Fast feedback loops” "Easiness of doing one’s job” “How quick I can be productive with a tool” “Happy developers create exceptional software in the log term” “It’s reduced time to find things, tools downtime” “Means to be flexible for new paradigms and be able to integrate many frameworks and tools” Your answers
6. Developer Experience “…developer experience could be defined as a means for capturing how developers think and feel about their activities within their working environments, #jbcn22 @vitalethomas with the assumption that an improvement of the developer experience has positive impacts on characteristics such as sustained team and project performance.” (F. Fagerholm, J. Münch) Developer Experience: Concept and De fi nition (F. Fagerholm, J. Münch)
7. #jbcn22 @vitalethomas Developer Experience: Concept and De fi nition (F. Fagerholm, J. Münch) Developer Experience Conceptual Framework
8. Value #jbcn22 @vitalethomas
9. #jbcn22 @vitalethomas Developer Experience Tools are not enough ORGANIZATION PROCESSES TECHNOLOGY CULTURE
10. #jbcn22 @vitalethomas Technologies Developer experience with Java on Kubernetes
11. #jbcn22 @vitalethomas Team Topologies Organisational design for software
12. #jbcn22 @vitalethomas Continuous Delivery Better software faster
13. Development Workflow #jbcn22 @vitalethomas
14. #jbcn22 @vitalethomas Development Workflow Inner Loop and Outer Loop Inner Loop ‣Code ‣Build ‣Deploy ‣Debug Outer Loop ‣CI/CD ‣Compliance, security ‣Con fi guration, monitoring ‣Production deployment git push
15. #jbcn22 @vitalethomas Inner Development Loop Code, build, test E ffi cient Inner Development Loops for Cloud Native Applications https://www.getambassador.io/resources/inner-dev-loop/
16. Goals #jbcn22 @vitalethomas 2 Reduced cognitive load 3 Clear path to production 1 Rapid and continuous feedback loop
17. Cloud Native #jbcn22 @vitalethomas
18. #jbcn22 @vitalethomas From Traditional to Cloud Native Application Server, Embedded Server Runtime (JVM) Middleware (Application Server) Application (WAR/EAR) Runtime (JVM) Application (JAR)
19. Containers #jbcn22 @vitalethomas
20. #jbcn22 @vitalethomas Moving to Containers Application Server, Embedded Server, Container Runtime (JVM) Middleware (Application Server) Application (WAR/EAR) Runtime (JVM) Application (JAR) Runtime (OCI) Application (Container)
21. Cloud Native Buildpacks #jbcn22 @vitalethomas
22. Image #jbcn22 @vitalethomas pack build Cloud Native Buildpacks From source code to container image
23. Kubernetes #jbcn22 @vitalethomas
24. #jbcn22 @vitalethomas Moving to Kubernetes Application Server, Embedded Server, Container, Kubernetes Runtime (JVM) Middleware (Application Server) Application (WAR/EAR) Runtime (JVM) Application (JAR) Runtime (OCI) Application (Container) Runtime (OCI) Middleware (Kubernetes) Application (Container)
25. Tilt #jbcn22 @vitalethomas
26. Tilt Continuous development on Kubernetes #jbcn22 @vitalethomas
27. Tilt Continuous development on Kubernetes #jbcn22 @vitalethomas
28. Skaffold #jbcn22 @vitalethomas
29. Skaffold Continuous development on Kubernetes #jbcn22 @vitalethomas
30. Telepresence #jbcn22 @vitalethomas
31. Telepresence Local-to-remote bridges for fast iterations #jbcn22 @vitalethomas
32. Knative #jbcn22 @vitalethomas
33. Knative Serverless experience on Kubernetes #jbcn22 @vitalethomas
34. Serverless Architectures Developers focus on code Focus on business logic Developer Platform Infrastructure Provisioning Workload Management Dynamic Scaling #jbcn22 @vitalethomas
35. Knative Serving Serverless Experience on Kubernetes Developer-friendly abstractions From image to URL Autoscaling Scaling to zero Progressive Rollouts Request-driven Event-driven Cloud agnostic #jbcn22 @vitalethomas
36. Argo CD #jbcn22 @vitalethomas
37. Argo CD Continuous Deployment with GitOps #jbcn22 @vitalethomas
38. Cartographer #jbcn22 @vitalethomas
39. Cartographer Golden paths to production #jbcn22 @vitalethomas
40. Example: Minimal Path Source -> Image -> URL Deploy to Kubernetes Package as container image Checkout source code
41. Delivering Value From code to production Developer App Repo Production Application Operator Security Expert Platform Engineer
42. Resources #jbcn22 @vitalethomas
43. Resources Source code • Presentation source code • The developer experience and the inner dev loop • Docker fi les vs. Cloud Native Buildpacks • Knative and Spring: Bringing back the func • Developer Work fl ow • Software Supply Chain Choreography #jbcn22 @vitalethomas
44. https://github.com/ThomasVitale/awesome-spring
45. Enlightning Learn cloud concepts with Whitney and her lightboard #jbcn22 @vitalethomas Tomorrow, 16:55
46. Discount codes Manning • 35% discount code, valid for all products in all format • ctwjbcn22 • manning.com thomasvitale.com @vitalethomas
47. Thomas Vitale JBCNConf Jul 18th, 2022 Developer Experience With Java on Kubernetes @vitalethomas